Description
The ecm uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor, intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condition of the lock-up clutch.
Then the ecm compares the engagement conditions of the lock-up clutch with the lock-up schedule in the ecm memory to detect mechanical problems of the shift solenoid valve dsl, valve body and torque converter clutch.
Monitor description
Torque converter lock-up is controlled by the ecm based on the speed sensor (nt), speed sensor (nc), engine rpm, engine load, engine temperature, vehicle speed, transmission temperature and gear selection.
The ecm determines the lock-up status of the torque converter by comparing the engine rpm (ne) to the input turbine rpm (nt). The ecm calculates the actual transmission gear by comparing input turbine rpm control voltage to counter gear rpm (nc). When conditions are appropriate, the ecm requests "lock-up" by applying control voltage to the shift solenoid valve dsl. When the dsl is turned on, it applies pressure to the lock-up relay valve and locks the torque converter clutch.
If the ecm detects no lock-up after lock-up has been requested or if it detects lock-up when it is not requested, the ecm interprets this as a fault in the shift solenoid valve dsl or lock-up system performance.
The ecm will illuminate the mil and store the dtc.
Example:
When any of the following is met, the system judges it as a malfunction.
(Engine speed is at least 100 rpm greater than input turbine speed.)
(The difference between engine speed and input turbine speed is less than 35 rpm.)
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Either of the following conditions is met: off malfunction or on malfunction
Off malfunction
On malfunction
2 Detections are necessary per driving cycle:
1St detection: temporary flag on
2Nd detection: pending fault code on
Vehicle speed must be under 10 km/h (6.2 Mph) once before 2nd detection
Wiring diagram
Inspection procedure
Hint:
Performing the intelligent tester's active test allows relay, vsv, actuator and other items to be operated without removing any parts. Performing the active test early in troubleshooting is one way to save time.
The data list can be displayed during the active test.
Hint:
Hint:
Result
Hint:
If any other codes besides p0741 are output, perform troubleshooting for those dtcs first.
Standard resistance
Standard resistance
Replace ecm
Standard resistance: 11 to 13 ùat 20°c (68°f)
Ok: valve moves and makes operating noise.
Ok: the connectors and pins are securely installed.
There is no open or short on the wire harness.
Ok: there are no foreign objects on each valve.
Ok: the torque converter clutch operates normally.
Repair automatic transaxle assembly
Releasing and stowing the seat belt (for the rear center seat)
To release the hooked buckle
“b”, push the buckle release
button.
Release button
To release the hooked plate
A insert the mechanical key
Or plate B or the
wireless key into the hole on
the buckle.
When releasing the seat belt,
retract it slowly.
Stow th ...
Operation flow
Hint:
Perform troubleshooting in accordance with the
procedures below. The following is an outline of basic
troubleshooting procedures. Confirm the troubleshooting
procedures for the circuit you are working on before
beginning troubleshooting.
Ask
the customer about the conditions and en ...
Using the steering wheel audio switches
Some audio features can be controlled using the switches on
the steering wheel.
Operation may differ depending on the type of audio system or
navigation system. For details, refer to the manual provided with
the audio system or navigation system.
Volume
Radio mode:
selects a radio stat ...